I just stumbled across (as one is prone to doing with EAP releases) a new feature wherein IntellIJ colors the classes that are in the compiling JDK but not available in the target JDK (e.g. targeting 1.7 while developing on 1.8).
Thank you so much for that! It is incredibly awesome.
Thanks also for the regex case transformation; that's also a huge win for me, but I suspect the class availability coloring will positively impact more people.